CN220552769U - Calibrating device for laser gas analyzer - Google Patents

Abstract

The present disclosure relates to a calibration device for a laser gas analyzer, including laser emitter, clamping assembly and linkage segment, the laser emitter centre gripping is in the clamping assembly, and the clamping assembly is connected with the first end of linkage segment, and the second end of linkage segment is used for detachably and pipe connection. The clamping assembly further includes a plurality of clamping portions that can simultaneously be moved closer to or farther from the laser transmitter in a radial direction of the laser transmitter so that the laser transmitter can be located at a center of the clamping assembly. The laser transmitter is fixed on one side of the pipeline, so that the stability of the light source can be ensured. Simultaneously, a plurality of clamping parts are close to along the radial direction of the laser transmitter simultaneously, the connecting line of the clamping part near one end of the laser transmitter can limit the clamping range, and the center of the clamping range always coincides with the center of the adjusting flange in the moving process of the clamping part, so that the light source position of the laser transmitter clamped in the middle of the clamping parts coincides with the light source position of the transmitting end, and the calibration efficiency and precision are improved.

Description

Calibrating device for laser gas analyzer

Technical Field

The present disclosure relates to the field of gas content detection technology, and in particular, to a calibration device for a laser gas analyzer.

Background

The laser gas analyzer is an optical instrument, and the principle is that an emitter arranged on one side of a flue emits infrared laser to a receiver on the other side opposite to the flue, and when the infrared light passes through the gas in the flue, a part of the infrared light is absorbed by a specific gas, the rest of the infrared light is received by the receiver, and the concentration data of the specific gas can be obtained by analyzing the selective absorption amount of the laser by the gas.

Wherein, during the measurement process, the emitter and the receiver need to be aligned strictly to ensure the accuracy of the measurement result. However, since the apparatus is mounted on the flue wall, it is subject to field vibrations, ambient temperature, flue gas temperature in the flue and slight deformations of the flue, and the laser beam emitted by the emitter and the central axis of the receiver are offset after a period of use, calibration is required. At present, a manual handheld laser pen is generally adopted to simulate a light path, and then a connecting flange is adjusted for calibration, however, the stability of a handheld light source is poor, the light source cannot be guaranteed to be always positioned at the center of a circle of a measuring cylinder, the calibration time is long, and the calibration precision is low.

Disclosure of Invention

An object of the present disclosure is to provide a calibration device for a laser gas analyzer to solve the above technical problems.

In order to achieve the above object, the present disclosure provides a calibration device for a laser gas analyzer, including a laser emitter, a clamping assembly, and a connection section, wherein the laser emitter is clamped to the clamping assembly, the clamping assembly is connected to a first end of the connection section, and a second end of the connection section is used for being detachably connected to a pipe;

the clamping assembly further comprises a plurality of clamping portions, and the plurality of clamping portions can simultaneously approach or depart from the laser emitter along the radial direction of the laser emitter so that the laser emitter can be positioned at the center of the clamping assembly.

Optionally, the clamping assembly includes clamping disk and a plurality of spout, and is a plurality of the spout is followed respectively the radial extension of clamping disk, and a plurality of the spout is followed the circumference equidistant setting of clamping disk, a plurality of clamping part sets up respectively in corresponding in the spout, a plurality of on the clamping disk the intersection of the extension line of spout is formed with the through-hole, laser emitter wears to locate the through-hole.

Optionally, the clamping assembly further comprises a spiral disc, a first groove matched with the spiral disc is formed on one side, close to the spiral disc, of each clamping portion, and the first groove is configured to move along the radial direction of the spiral disc under the rotation driving of the clamping disc, so that a plurality of clamping portions can move in the sliding groove at the same time.

Optionally, the centre gripping coiled self axis rotationally set up in the first end of linkage segment, the spiral dish with the first end fixed connection of linkage segment.

Optionally, an abutment portion is formed at an end of the clamping portion near the laser emitter, and a width of a horizontal section of the abutment portion gradually decreases from an end far away from the laser emitter to an end near the laser emitter.

Optionally, an abutment plane is provided at an end of the abutment portion near the laser emitter.

Optionally, a plurality of concave parts are formed on the propping plane.

Optionally, a friction surface is formed on an outer sidewall of the clamping disk.

Optionally, a via hole is formed in the connection section, the via hole is communicated with the through hole, and an internal thread is formed on the inner wall of the via hole and is used for being matched with an external thread at the joint of the pipeline.

Optionally, a circle formed by connecting lines of the plurality of clamping parts near one end of the laser emitter has a diameter of 2mm-80mm.

Through above-mentioned technical scheme, fix laser emitter in pipeline one side, can avoid because the unstable problem in light source position that handheld laser emitter leads to. Simultaneously, a plurality of clamping parts are close to along the radial direction of the laser transmitter simultaneously, the connecting line of the clamping part near one end of the laser transmitter can limit the clamping range, and the center of the clamping range always coincides with the center of the adjusting flange in the moving process of the clamping part, so that the light source position of the laser transmitter clamped in the middle of the clamping parts coincides with the light source position of the transmitting end, and the calibration efficiency and precision are improved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic perspective view of a calibration device provided in one embodiment of the present disclosure;

FIG. 2 is a schematic perspective view of a calibration device provided by one embodiment of the present disclosure, wherein the laser transmitter is not shown;

FIG. 3 is a schematic illustration of the cooperation of a clamp and a spiral disk provided by one embodiment of the present disclosure;

FIG. 4 is a schematic perspective view of a clamp provided by one embodiment of the present disclosure;

fig. 5 is a schematic cross-sectional view of a calibration device provided in one embodiment of the present disclosure.

Description of the reference numerals

100-calibrating the device; 1-a laser emitter; 2-a clamping assembly; 21-a clamping part; 211-a first groove; 212-abutting the top; 213-abutment plane; 214-a depression; 22-clamping plate; 23-sliding grooves; 24-through holes; 25-spiral discs; 3-connecting sections; 31-via holes.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise indicated, terms of orientation such as "upper" and "lower" are generally defined with reference to the orientation of the drawing figures. "inner and outer" means both the inner and outer of the profile of the corresponding part. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

The transmitting end and the receiving end of the laser gas analyzer are respectively arranged on two opposite sides of a pipeline through which gas to be measured passes through flange connection, the flange comprises a connecting flange and an adjusting flange, the connecting flange is connected with the pipeline through a first connecting pipe, the adjusting flange is connected with the connecting flange through bolts, and the adjusting flange is connected with the transmitting end or the receiving end of the laser gas analyzer through a second connecting pipe. The light path of the laser gas analyzer is calibrated by utilizing a laser transmitter to replace a transmitting end to transmit light at an adjusting flange, and further adjusting the relative position of the connecting flange and the adjusting flange according to whether a falling point of the light is at the center of a receiving end, so that the transmitted laser beam can fall at the center of the receiving end after the transmitting end is arranged on the adjusting flange.

As shown in fig. 1 to 5, the present disclosure provides a calibration device 100 for a laser gas analyzer, including a laser emitter 1, a clamping assembly 2 and a connection section 3, the laser emitter 1 is clamped in the clamping assembly 2, the clamping assembly 2 is connected with a first end of the connection section 3, and a second end of the connection section 3 is used for being detachably connected with a pipe. The clamping assembly 2 further comprises a plurality of clamping portions 21, the plurality of clamping portions 21 being capable of simultaneously approaching or moving away from the laser transmitter 1 in a radial direction of the laser transmitter 1, so that the laser transmitter 1 can be located at the center of the clamping assembly 2.

Through above-mentioned technical scheme, fix laser emitter 1 in pipeline one side, can avoid the unstable problem in light source position because handheld laser emitter 1 leads to. Simultaneously, a plurality of clamping parts 21 are close to each other along the radial direction of the laser emitter 1, a connecting line of one end of the clamping part 21 close to the laser emitter 1 can define a clamping range, and the center of the clamping range always coincides with the center of the adjusting flange in the moving process of the clamping part 21, so that the light source position of the laser emitter 1 clamped in the middle of the clamping parts 21 coincides with the light source position of the emitting end, and the calibration efficiency and the calibration precision are improved.

Alternatively, as shown in fig. 2, the clamping assembly 2 may include a clamping disc 22 and a plurality of sliding grooves 23, where the plurality of sliding grooves 23 extend along a radial direction of the clamping disc 22, and the plurality of sliding grooves 23 are disposed at equal intervals along a circumferential direction of the clamping disc 22, the plurality of clamping portions 21 are disposed in the corresponding sliding grooves 23, a through hole 24 is formed at a junction of extension lines of the plurality of sliding grooves 23 on the clamping disc 22, and the laser transmitter 1 is disposed through the through hole 24. Since the center of the clamping disc 22 coincides with the center of the adjusting flange, the sliding groove 23 arranged along the radial direction of the clamping disc 22 can limit the moving path of the clamping part 21, so that when the clamping part 21 moves towards the direction approaching to the laser emitter 1, the clamping part 21 always moves towards the center of the clamping disc 22, and the plurality of clamping parts 21 can fix the laser emitter 1 at the center of the clamping disc 22.

In one embodiment of the present disclosure, the number of the sliding grooves 23 and the clamping portions 21 may be three, the number of the sliding grooves 23 corresponding to the clamping portions 21 is three, and the included angles between any two adjacent sliding grooves 23 in the three sliding grooves 23 are equal, so as to ensure that the degree of freedom of the laser transmitter 1 in each direction is limited.

Alternatively, as shown in fig. 3, the clamping assembly 2 further includes a spiral disc 25, and a first groove 211 engaged with the spiral disc 25 is formed at a side of each clamping portion 21 adjacent to the spiral disc 25, and the first groove 211 is configured to be movable in a radial direction of the spiral disc 25 by rotation of the clamping disc 22 so that the plurality of clamping portions 21 are simultaneously moved within the slide grooves 23. The spiral disc 25 is formed with a protrusion along the archimedes spiral on a surface contacting the clamping part 21, and the first groove 211 can be matched with the protrusion, so that the clamping part 21 is driven to move along the protruding direction along with the rotation of the clamping part 21 driven by the clamping disc 22, and the clamping part 21 is driven to move along the radial direction of the spiral disc 25. By doing so, the plurality of holding portions 21 provided along the circumferential direction of the holding pan 22 can be made to hold the laser emitter 1 simultaneously in different directions, limiting the degree of freedom of the laser emitter 1 in the radial direction. In addition, the movement of the clamping parts 21 is guided by the protrusions on the spiral disk 25, so that the clamping parts 21 can be driven to move simultaneously, and the efficiency of installing the laser transmitter 1 is improved.

Optionally, the clamping disc 22 is rotatably disposed at the first end of the connecting section 3 around its central axis, and the spiral disc 25 is fixedly connected to the first end of the connecting section 3. Since the first end and the second end of the connecting section 3 are respectively connected with the pipeline and the clamping assembly 2 in the installation process of the calibration device 100, the connecting section 3 cannot rotate, and in order to enable the clamping portions 21 to simultaneously move along the radial direction of the clamping disc 22 under the driving of the spiral disc 25, the spiral disc 25 is fixedly connected with the first end of the connecting section 3, and the clamping portions 21 arranged in the sliding grooves 23 of the clamping disc 22 are driven by rotating the clamping disc 22, so that the clamping portions 21 and the spiral disc 25 relatively rotate, and the clamping portions 21 are driven to simultaneously move along the radial direction of the spiral disc 25.

In another embodiment of the present disclosure, the clamping assembly may further include a plurality of actuating members and a plurality of guide rods, wherein the plurality of guide rods are disposed around the through holes, and the plurality of actuating members are respectively sleeved on the corresponding guide rods, so that the actuating members move along the axial direction of the guide rods. The actuating member is formed with a second groove on a side thereof adjacent to the clamping portion, and the clamping portion is formed with a third groove cooperating with the second groove, the third groove being configured to be movable in the chute under the drive of the actuating member. The clamping assembly further comprises a gear, teeth matched with the gear are formed on one side, close to the gear, of the actuating piece, and the actuating piece can be driven to move along the axial direction of the guide rod along with rotation of the gear.

Alternatively, the guide rod may be a screw rod, and the actuating member is screwed with the guide rod to form a screw nut pair, and may move along the axial direction of the screw rod along with the rotation of the screw rod.

In order to enhance the degree of tightening of the grip, alternatively, as shown in fig. 4, an end of the grip portion 21 near the laser emitter 1 is formed with a butt portion 212, and a width of a horizontal cross section of the butt portion 212 in a direction perpendicular to an extending direction of the grip portion 21 gradually decreases from an end far from the laser emitter 1 to an end near the laser emitter 1. Because the abutment 212 is used to contact with the laser emitter 1 and abut against the outer surface of the laser emitter 1 to limit the movement of the laser emitter 1, the small width of the horizontal section of the abutment 212 near the end of the laser emitter 1 means that the contact area between the abutment 212 and the laser emitter 1 is small, and under the condition of a certain acting force, the smaller the contact area is, the larger the pressure is, so that the difficulty of relative movement between the abutment 212 and the laser emitter 1 is increased, and the clamping fastening degree is improved.

Optionally, as shown in fig. 4, the abutment portion 212 is provided with an abutment plane 213. The abutment plane 213 is used for contacting with the outer surface of the laser emitter 1, so that the contact portion between the outer surface of the laser emitter 1 and the abutment 212 is a plane, and compared with the case that the contact portion is a line, the contact plane can increase the contact area, thereby ensuring that the pressure of the contact portion is not too high in the abutment state, and protecting the flatness of the outer surface of the laser emitter 1.

Optionally, a side of the clamping portion, which is close to the laser emitter, is provided with a propping surface, and the propping surface may be an arc surface. The arced surface can be matched with the outline of the outer surface of the laser transmitter, so that the contact area is increased, and the stability of clamping is improved.

Alternatively, as shown in fig. 4, a plurality of concave portions 214 are formed on the abutment plane 213. Providing a plurality of recesses 214 on the abutment plane 213 can increase the surface roughness of the abutment plane 213, and promote the friction between the laser emitter 1 and the abutment plane 213, thereby improving the stability of clamping.

Optionally, a friction surface is formed on the outer sidewall of the clamping disk 22. In the process of rotating the clamping disc 22 to clamp the laser transmitter 1, the friction surface arranged on the outer side wall of the clamping disc 22 can increase the surface roughness of the outer side wall, so that the anti-skid effect is achieved.

Alternatively, the friction surface may be a vertically striped surface or a diamond-shaped textured surface.

Alternatively, as shown in fig. 5, a via hole 31 is formed in the connection section 3, the via hole 31 communicates with the through hole 24, and an internal thread is formed on an inner wall of the via hole 31 for mating with an external thread at a pipe connection. The clamping assembly 2 is connected with the pipeline through the internal thread arranged in the connecting section 3 by utilizing the external thread matched with the transmitting end of the laser gas analyzer at the connecting position of the pipeline, and the calibration device 100 can be installed by utilizing the existing structure, so that the processing difficulty and cost of the calibration device 100 are reduced.

Alternatively, the diameter of a circle formed by the line connecting the plurality of holding portions 21 near one end of the laser emitter 1 is 2mm to 80mm. The laser transmitter 1 may be adapted to the clamping assembly 2 of the present disclosure in a cross section within the scope of the circle formation, thereby increasing the suitability of the clamping assembly 2 for the laser transmitter 1.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. A calibration device for a laser gas analyzer, comprising a laser transmitter, a clamping assembly and a connecting section, wherein the laser transmitter is clamped on the clamping assembly, the clamping assembly is connected with a first end of the connecting section, and a second end of the connecting section is used for being detachably connected with a pipeline;

the clamping assembly further comprises a plurality of clamping portions, and the plurality of clamping portions can simultaneously approach or depart from the laser emitter along the radial direction of the laser emitter so that the laser emitter can be positioned at the center of the clamping assembly.

2. The calibration device of claim 1, wherein the clamping assembly comprises a clamping disc and a plurality of sliding grooves, the sliding grooves extend in the radial direction of the clamping disc respectively, the sliding grooves are arranged at equal intervals in the circumferential direction of the clamping disc, the clamping portions are arranged in the corresponding sliding grooves respectively, through holes are formed at the intersections of extension lines of the sliding grooves on the clamping disc, and the laser transmitter penetrates through the through holes.

3. The alignment device of claim 2, wherein the clamp assembly further comprises a screw plate, a side of each clamp portion adjacent to the screw plate being formed with a first groove cooperating with the screw plate, the first groove being configured to be movable in a radial direction of the screw plate under rotational drive of the clamp plate to move a plurality of the clamp portions simultaneously within the slide groove.

4. A calibration device according to claim 3, wherein the clamping coil is rotatably arranged at the first end of the connecting section about its own central axis, and the screw disc is fixedly connected to the first end of the connecting section.

5. The alignment device of claim 1, wherein the clamping portion is formed with a abutment portion at an end thereof adjacent to the laser transmitter, the abutment portion having a horizontal cross-section that gradually decreases in width from an end thereof remote from the laser transmitter to an end thereof adjacent to the laser transmitter.

6. The alignment device of claim 5, wherein an end of the abutment portion proximate the laser transmitter is provided with an abutment plane.

7. The alignment device of claim 6, wherein the abutment plane has a plurality of recesses formed therein.

8. The alignment device of claim 2 wherein the outer sidewall of the clamping disk has a friction surface formed thereon.

9. The alignment device of claim 2, wherein a via is formed in the connection section, the via being in communication with the through hole, an internal thread being formed on an inner wall of the via for mating with an external thread at the pipe connection.

10. The alignment device of claim 1, wherein a circle formed by a line connecting ends of the plurality of holding portions near the one end of the laser emitter has a diameter of 2mm to 80mm.